I use all Agromax bulbs.
I use 2-veg, 2-bloom, 2-pure par, 1-10,000k+uva and 1-5400k.
You can use the 10kuva bulbs full time.
I never run the t5 6 inches away. I run them about 12-15 inches. The unit I use double stacks the bulbs. Its the same width as a normal 4 bulb unit. Any closer and it burns the plants.
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Both were autos and dense.
I may use the cobs above and t5 for side lighting. Don't know yet. Ill figure it out.
Smaller chips may be the new thing but I got the cob rig for a good price.